/Engine/Source/Editor/BlueprintGraph/Classes/EdGraphSchema_K2.h
Get the type tree for all of the property types valid for this schema
void GetVariableTypeTree ( [TArray](API\Runtime\Core\Containers\TArray)< [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FPinTypeTreeInfo](API\Editor\BlueprintGraph\UEdGraphSchema_K2\FPinTypeTreeInfo) > > & TypeTree, ETypeTreeFilter TypeTreeFilter ) const